Waterjet HP Tube – High-Pressure Tubing for Waterjet Cutting Systems

Description:
This component is high-pressure (HP) tubing, also known as high-pressure pipe or waterjet line, designed for waterjet cutting systems. It is a precision-engineered tubular component that transports ultra-high-pressure water from the intensifier pump or direct-drive pump to the cutting head assembly. HP tubing is typically manufactured from specialized stainless steel to withstand extreme internal pressures and resist corrosion .

Applications:

• Used to convey high-pressure water (or abrasive slurry) from the pump outlet to the cutting head swivel or nozzle assembly.

• Installed along the motion axes (X, Y, Z) of the waterjet cutting machine to supply water while allowing flexible movement of the cutting head.

• Suitable for both pure water and abrasive waterjet systems operating at pressures from 40,000 psi to 90,000 psi (approximately 2,800 bar to 6,200 bar).

Features:

• Constructed from high-strength, corrosion-resistant stainless steel, typically with a seamless, precision-drawn structure to prevent failure under cyclic pressure loading .

• Available in standard outer diameter sizes including 1/4 inch, 3/8 inch, and 9/16 inch, each suited for different applications within the system .

• 1/4 inch tubing offers flexibility and is commonly used for moving axes (X, Y, Z motion) where bending is required .

• 3/8 inch tubing is typically used for transmission from the pump to the machine base and can be moderately bent .

• 9/16 inch tubing is used for long-distance high-pressure transmission due to its larger inner diameter which reduces pressure loss; it is not bendable and requires fittings at corners .

• Engineered to withstand continuous pressure cycling from zero to maximum operating pressure without fatigue failure.

• Precision-machined ends or cone connections for secure, leak-free assembly with standard high-pressure fittings such as glands and cones.

Maintenance:

• Fully depressurize the waterjet system and follow lockout/tagout procedures before inspecting, disconnecting, or replacing any HP tube.

• Regularly inspect the external surface of the tubing for signs of pitting, corrosion, cracking, fretting wear (from contact with machine structure), or visible damage.

• Check all cone sealing surfaces and threaded end connections for wear, galling, or deformation that could cause high-pressure leaks.

• Clean the tubing exterior and connection points with a soft cloth and low-pressure water; avoid abrasive tools that could scratch the surface and create stress risers.

• When replacing a section of HP tube, ensure the replacement matches the original outer diameter (e.g., 1/4 inch, 3/8 inch, or 9/16 inch), material specification, and pressure rating.

• Use only manufacturer-recommended fittings, glands, and cones for reconnection; do not mix components from different systems.

• Apply high-pressure thread sealant or anti-seize lubricant to threads and cones as specified in the equipment service manual.

• Tighten gland nuts to the specific torque value provided in the equipment manual; over-tightening may damage the cone seal or tube end, while under-tightening may cause leaks.

• If the tubing shows any signs of bulging, flattening, crack initiation, or severe corrosion, replace the affected section immediately.

• For rigid 9/16 inch tubing used in long runs, ensure proper clamping and support to prevent vibration-induced fatigue failure .